The Sally-Port, an area designed to allow troops to gather for an attack or "Sally" on enemy troops, at the main entrance to Fort Moultrie, part of the Fort Sumter National Monument, is the third incarnation of a fort built at this site in Sullivan's Island, SC on Saturday, March 9, 2013. Copyright 2013 Jason Barnette
The watch tower, part of the Endicott modernization, at Fort Moultrie, part of the Fort Sumter National Monument, is the third incarnation of a fort built at this site in Sullivan's Island, SC on Saturday, March 9, 2013. Copyright 2013 Jason Barnette
A single 4.72" Armstrong Rapid Fire Gun, part of the Endicott modernization, at Fort Moultrie, part of the Fort Sumter National Monument, is the third incarnation of a fort built at this site in Sullivan's Island, SC on Saturday, March 9, 2013. Copyright 2013 Jason Barnette